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					   Vol. 4 No. 4 Fall 2008                    Journal of Double Star Observations                                  Page 175




               Ludwig Schupmann Observatory Measures of
                       Large ∆m Pairs - Part Two
                                                  James A. Daley

                                      Ludwig Schupmann Observatory
                                             New Ipswich, NH

                                          Email: rigel@net1plus.com


         Abstract: This report, the second in this 3 part series, presents recent measurements in theta and rho
         space of 50 components in 25 mostly large ∆ m systems. A comparatively small number of these pairs
         are physical.




                                                              and the binaries displaying small but detectable
Introduction                                                  position changes in most cases, the motions being
    Difficulties attending CCD measurements of large          reasonably consistent with previous measures- old
∆m pairs are described in an article by the author in a       and recent. Most measures are the mean of at least 12
previous article (Daley, 2007). The specialized tail-         CCD frames.
piece optics used to make the measures reported here              Among the few discoveries is an interesting red
is also covered in that article and in a later article        cpm pair in UMa (DAL 43, 12hr 05m 47.4988s +53○
(Daley, 2008). Keen-eyed observers such as S. W.              54' 55.491"). Photometric measures (currently incom-
Burnham, Alvan Graham Clark and the Herschel’s,               plete) of this wide pair will be presented in a future
William and John, were dominant in the discovery of           article.
these contrasting component pairs. They usually
employed the biggest reflectors and refractors of the         Some CCD Images
time. It is only recently, with the introduction of the           Figure 1 shows STF 1110 (Castor), a popular fast
CCD, that amateurs with small telescopes have an              moving pair. Both the A and B components are clearly
opportunity to measure these systems.                         resolved behind the foil. The slightly overexposed
                                                              image of the eclipsing red pair YY Gem, which is
The Measures
                                                              physical with Castor, and the faint optical component
    The following data is listed in the conventional          "D" are well shown in this 10 second unfiltered expo-
way. From left to right: the discoverer's designation ,       sure.
WDS identifier (Epoch 2000 RA & Dec), WDS mags                    Figure 2 shows an image of BU 103 (upsilon Gem)
rounded off to the first place (LSO unfiltered CCD            with the primary highly attenuated behind the oc-
"red" magnitudes in bold italics are ∆m inferred from         culting foil strip. Relying on the one discovery meas-
known stars in the system), LSO position angle in             ure 97-years ago, careful graphing demonstrates that
degrees, LSO separation in seconds of arc, decimal            the apparent motion of the secondary is precisely
date of observation, number of nights observed and a          what is predicted by the proper motion of the primary,
notes column. In the notes column entries such as             thus the companion is almost certainly optical.
5m83 signifies 5 previous measures, the last being 83             Finally, Figure 3 is an image of Sirius utilizing a
years ago. Other self explanatory items, perhaps of           square aperture mask and no occultor. Although
interest, appear in this column.                              interesting, it would be a challenge to measure. How-
    There is no note section as all-in-all the work,          ever, the intersection of the diffraction spikes may
although tedious, was without surprise; the optical           give a reasonably good location of the primary as the
components, for the most part, showing giant motions          mask is positioned very close to the objective's first
    Vol. 4 No. 4 Fall 2008                     Journal of Double Star Observations                            Page 176


                  Ludwig Schupmann Observatory Measures of Large ∆m Pairs - Part Two


                                                                surface. A set of occulted images of Sirius were used
                                                                for the included LSO measure and may be presented
                                                                in a future article As with the other images, North is
                                                                up and East is left.
                                                                    All images shown here are single frames (no
                                                                stacking).
                                                                    This ongoing measurement program is guided by
                                                                an observation list generated by Brian Mason based
                                                                on LSO's instrumentation capability and, in general,
                                                                covers a ∆m range of 8 to 12 with the primary compo-
                                                                nent no fainter than 4.5. Measurements are per-
                                                                formed with a 9-inch aperture Schupmann medial
                                                                telescope, a tailpiece stellar coronagraph and an
                                                                unfiltered ST-7XE CCD.
   Figure 1: Castor (STF1110) with A B components visible
   through filter.
                                                                References
                                                                Daley, J.A. (2007), "A Method of Measuring High
                                                                   Delta m Doubles", JDSO, vol 3, pg 159 - 164.
                                                                Daley, J.A. (2008), "Ludwig Schupmann Observatory
                                                                   Measures of Large ∆m Pairs - Part One", JDSO,
                                                                   vol 4, 34 - 39.




   Figure 2: Image of υ Gem, almost certainly an optical dou-
   ble (see text).




Figure 3: Image of Sirius and B component taken with no                                     Table begins on next page.
occultor
Vol. 4 No. 4 Fall 2008                          Journal of Double Star Observations                             Page 177


              Ludwig Schupmann Observatory Measures of Large ∆m Pairs - Part Two


    Discoverer           RA &   Dec      Mags           PA      Sep      Date      n               Notes

BU    554AB          05020+4349       3.0    14.0     225.2    29.72    2008.129   1   5m83, Epsilon Aur, binary

BU    554AC          05020+4349       3.0    11.3     275.5    43.44    2008.129   1

BU    554AD          05020+4349       3.0    12.0     316.4    45.14    2008.129   1   5m83

STF 668A-BC          05145-0812       0.3    6.8      203.5     9.20    2008.120   2   Rigel

BU    555AD          05145-0812       0.3    10.5       1.1    44.60    2008.121   3   5m87,    red mag of D

BU    558Aa-B        05320-0018       2.2    14.0     228.3    33.41    2008.129   1   Delta Ori

STF    14Aa-C        05320-0018       2.2    6.8        0.2    52.49    2008.129   1   binary

BU 1056AB-C          06024+0939       4.1    14.0     284.7    18.91    2008.151   1   7m53 Mu Ori

BU 1405AC            06041+2316       4.3    13.0      24.9    105.61   2008.153   1   1 Gem

J    2016AB          06119+1413       4.5    13.0     186.6    37.81    2008.153   1   Xi Ori

J    2016BC          06119+1413       12.3   2.3      150.5     4.68    2008.153   1   2m24

DAL    40AD          06119+1413       4.5    11.4     164.0    36.01    2008.153   1   new component, red mag

DAL    40AE          06119+1413       4.5    11.8      22.2    43.52    2008.153   1   new component, red mag

HJ    348AB          06149-0617       4.0    13.1      26.1    53.74    2008.162   1   1m 103, Gamma Mon

DAL    41AC          06149-0617       4.0    13.6     308.1    47.89    2008.162   1   new component, red mag

STF 900AB            06238+0436       4.4    6.6       28.9    12.50    2008.173   1   Epsilon Mon

STF 900AC            06238+0436       4.4    12.7     254.1    91.80    2008.173   1

AGC     1AB          06451-1643       -1.5   8.5       97.2     8.07    2008.151   1   Sirius

BU 1411AF            06451-1643       -1.5    9.5      62.1    122.75   2008.271   1   4m33, estimated red mag

SHJ    77AC          07041+2034       4.0    7.7      347.0    101.27   2008.181   1   Zeta Gem

SHJ    77AD          07041+2034       3.8    12.0     353.5    67.75    2008.181   1   2m24,

SHJ    77CD          07041+2034       7.8    12.9     154.1    34.71    2008.181   1

J      58            07119-0030       4.1    13.0     171.7    33.21    2008.181   1   Delta Mon

BUP 101AB            07272+0817       2.9    13.0      77.1    48.97    2008.192   1   Beta CMi

BUP 101AC            07272+0817       2.9    11.2      25.3    104.15   2008.192   1

BUP 101AD            07272+0817       2.9    11.1      75.71   131.82   2008.192   1

BUP 101AE            07272+0817       2.9             313.6    138.33   2008.192   1

SLE 571AF            07272+0817       2.9    12.5     166.6    79.66    2008.192   1

SLE 571AG            07272+0817       2.9    13.0     176.7    83.83    2008.192   1

SLE 571FG            07272+0817       12.5   13.0     245.3    15.13    2008.192   1




                                                                                       Table continued on next page.
Vol. 4 No. 4 Fall 2008                          Journal of Double Star Observations                              Page 178


              Ludwig Schupmann Observatory Measures of Large ∆m Pairs - Part Two


    Discoverer           RA &   Dec      Mags           PA      Sep      Date      n               Notes
                                                                                       new component, red dm=
DAL    41FH          07272+0817       12.5   13.4      53.7     3.96    2008.192   1
                                                                                       0.9
LAM     4AB          07282+0856       4.3    13.3     233.7    26.62    2008.181   1   5m24, Gamma CMi

LAM     4AC          07282+0856       4.3    12.3     261.4    114.50   2008.181   1   1m97

STF1110AC            07346+3153       1.9    10.1     163.5    70.54    2008.246   1   Castor, C is YY Gem

STF1110AD            07346+3153       1.9    10.1     221.4    182.97   2008.246   1

BUP 103              07359+2654       4.1    13.2      40.4    55.17    2008.181   1   1m97, Upsilon       Gem

LAM     6AC          07393+0514       0.4    11.7      20.5    177.17   2008.246   1   51m24, Procyon

BU 1065AB            08165+0911       3.5    14.3     293.6    30.14    2008.194   1   Beta Cnc, binary

DAL    42AC          08165+0911       3.5    12.2      37.7    69.77    2008.194   1   new component

RST5507              08464-1333       4.3    13.7     266.4    27.12    2008.227   1   12 Hya

STF1273AB-D          08468+0625       3.5    12.5     199.7    18.03    2008.225   1   Eps Hya, Hyperbolic orbit

HJ 2489AB            09144+0219       3.9    9.8      241.0    20.30    2008.230   1   Theta Hya

HJ 2489AC            09144+0219       3.8    11.9     298.4    100.96   2008.230   1   2m46

B    2674AD          09144+0219       4.6    12.4     145.4    82.35    2008.230   1

GAN     5            10079+1000       4.4    13.6      40.8     7.98    2008.230   1   7m74, 31 Leo, cpm

STF     6AB          10084+1158       1.4    8.24     307.3    176.98   2008.271   1   Regulus

BU    593AB          10106-1221       3.6    13.3     103.0    71.34    2008.271   1   5m86, Lambda Hydra

DAL    43            12058+5355       9.2    11.9     349.9    55.24    2008.408   1   discovery, red cpm pair

BLL    29            12154+5702       3.3    10.2      73.50   182.03   2008.399   2   Megrez

BUP 140AC            12154+5702       3.3    12.0     128.0    175.33   2008.399   2

				
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